Glass-press.



W. S. GRAHAM.

GLASS PRESS.

APPLIGATION FILED NOV. 29, 1909.

Patented .55ug.9,1910.v

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-APPLIUATION FILED NOV.l 29,1909. 966,440. Patented Aug. 9, 1910.

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APPLICATION FILED NOV. 2951909.

966,440. Patented Aug. 9, 1910.

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W. S. GRAHAM.

GLASS PRI-ISS.

APPLICATION HLBD'Nov. 29, 1909.

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W1 S. GRAHAM.

GLASS PRESS.

ArrLloATxoN FILED Nov. 29, 1909.

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WALLACE S.`GRAHAM, 0F LANCASTER, OHIO.

GLASS-PRESS.

Specification of Letters Patent.

Patented Aug. 9, 1910.

Application led November 29, 1909. Serial No. 530,321.

To all 'whom 'it may concern:

Be it known that I, WALLACE S. GRAHAM, a citizen of the United States,and a resident of Lancaster, county of Fairfield, and State of Ohio,have invented a new and useful Im rovement in Glass-Presses, of whichthe fol owing is a specification, the princi le of the invention beingherein explaine and the best mode in which I have contemplated ap lyingthat principle so as to distinguish it rom other inventions.

My invention relates to machines for the manufacture of articles ofglass, and particularly to that type of machine in which the article isformed by pressing a die in a mold.

In general, the objects of my invention are to provide an automaticglass press which is adapted to perform a series of similar operationsin succession, each complete o eration comprising a sequence ofindividua operations.

Other objects of the invention will appear throughout the s ecification.

To the accomp ishment of these and re.- lated ends, said invention,then, consists of the means hereinafter fully described and particularlypointed out in the following claims.

The annexed drawings and the following description set forth indetailcertain mechanism embodying the invention, such disclosed meansconstituting, however, but one of'various mechanical forms in which theprinciple of the invention may be used.

In said annexed drawings Figure l is a side elevation of my machine,partly broken away and partly in section; Fig. 2 is an end view thereoflooking from the left in Fig. 1; Fig. 3 is a plan thereof; Fig. 4 is adetail of an ejector; Figs. 5 and 6 are views of a cylinder andassociated parts, partly broken partly in section; Fig. 7 is a det-ailof certain actuating mechanism with certain parts broken away, aildcertain parts shown in dotted line; and Fig. 8 is a detail of a catchholding the shears open.

My machine comprises first a supporting plate A-which is supported bythree legs A two spaced posts A2 and A3 extending vertically from thesupport A. The supporting plate A is in general form circular, but isprovided at certain points on its circumference with outwardly extendingbrackets, and is also rovided with an annular aperture. A tab e B ismounted on plate A, and

is revoluble about the post A2 as its axis. A pluralit of molds b aredisposed on the upper sur ace of table B, and on its periphery areprovided'a plurality of inclined projections b.

Sup orted by the plate A, at the outer edge t ereof, is a vertical postc, and pivoted on this post so as to be horizontally movable, are twocoperative knives C and C which are adapted to lie substantially overthe circle on which the molds b are arranged. A transverse shaft c4 iscarried by the post c, and to this shaft are keyed two rocker arms c3and 011 which slidably engage two pins c and c2 which extend laterallyfrom the knives C and C. A rocker arm c5 extends outwardly from shaft c4to which it is fixed, and at its outer end is ivoted to a verticallyreciprocable rod c which is held in elevated position by a spring c". Arocking lever o8 engages, at one end, a collar on post c, and its otherend extends to a oint adjacent to the periphery of table B. ear the baseon which the machine rests is a rocking lever c", one end of whichengages a collar on rod c6, that end being normally heldfrinrdepressedposition by a spring 01.

The post A2 extends downwardly from the table and supporting plate tothe base on which the machine rests, and on this portion of the post isrotatably mounted a sleeve D. This sleeve bears at its upper end ahorizontal arm d provided at its outer end with a verticallyreciprocable spring-pressed bolt d; this bolt is adapted to enter spacedholes in the bottom of the table B. Keyed to sleeve D near its lower endis a rocker arm d2 which, at its outer end, engages a horizontallyreciprocable rod da. (collars are provided on rod d3 on each side of armd2, collar cle having a limited sliding movement, and on one side of thearm is a compression spring d4, and on the other side a tension springd5. Adjacent to the post A3 is a vertically reciprocable rod (Z7. A bellcrank lever d8 is fulcrumed on one of the legs A', and one of its armsengages the lower end of rod al7 while the other end engages the outerend of rod d3.

A vertically reciprocable bolt E is disposed below the table B and isadapted, in

` its elevated position, to enter holes provided A horizontal bar e2 issecured to the lower end of bolt E. A vertically reciprocablerod F hasits lower end disposed adjacent to barl e2 and bears a collar which bare2 is designed to engage. A horizontal lever f is pivoted to the upperend of rod F and is supported intermediate its ends by a standard f.

A cylinder G is disposed between the posts A2 and A3 and is attachedthereto by a rod g2 which is attached to the upper cylinder head, and isheld by a cross arm g. The rod g2 is threaded so that by means of thenuts g the cylinder may be vertically adj usted. A piston gi'eciprocates vertically in the cylinder, and secured thereto is apiston rod g. To one side of the cylinder is a steam chest 0 which maybe connected in the usual manner with a steam supply. Ports g4 and g5connect the steam chest with the lower and upper sides of the cylinderrespectively, and the admission of steam..

through these ports is controlled by an ordinary slide valve g.Furthermore, the ports g4 and g5 are controlled respectively by valvesgif and g whose stems extend transversely through the ports. It isevident that by means of the valve stems of valves g1 and g, the openingin the ports through which the fluid pressure may pass may beeliectively controlled. The stem g7 of the slide valve g is pivoted tothe end of lever f opposite the end to which rod F is pivoted. A smallcylinder K is mounted on the upper cylinder head of cylinder G and has apiston vertically reciprocable therein, the piston rod 7c of which ispivoted to lever f on the same side of the fulcrum thereof that thevalve stem gl is pivoted. A passagek? connects the upper side ofcylinder G with the under side of cylinder K, and this passage is)controlled by an upwardly opening valve lc. The valve Ic is normallyheld to its seat by a spring; the casing is provided with an uppermember k3 threaded into the valve casing, and against which the upperend of the spring abuts. Obviously the tension of the spring may bevaried by means of the member 7:3, so that the valve may be regulated toopen at any predetermined pressure. In the passage k2 is a needle valvele, by Whicht-he size of opening in the passage may be'denitelycontrolled. A plunger H is secured to the lower end of piston rod g bymeans of the pivoted jaws h and nut h which is threaded on the pistonrod. A plate la? is supported adjacent to the plunger by means of aplate k3 which is vertically adjustable upon the piston rod, bolts h5connecting plates h2 and h3.

In each mold b is an ejector L which is secured to the upper end of avertically reciprocable rod Z, this head and rod being normally free toassume a position in which the head lies at the bottom of the mold.

Supported by a bracket extending outwardlyl its inner end adapted to liesubstantially over the circle on which the molds'are arranged. Arrangedbelow slideway M is a vertically reciprocable rod m and adjacent to postA2 is a second vertically reciprocable rod m2. Rocking lever m engagesat its two ends these two rods m and m2, the end of the lever adjacentto rod m being normally depressed by a spring.

The mode of operatlon of my machine may now be described. In itsinoperative state, the knives are opened, being so held by a suitablemanually operable catch. The inner end of leverc9 is thereby held inraised position and engages collar d6v on rod da so that the springs onthat rod are held in set position. The bolt E is held in its depressedposition, the rod F is depressed, and i' the slide valve is therebyadmitting steam to the lower port so .that the piston 1s at the top ofits stroke and the plunger is raised. The piston in small cylinder K isalso in raised position. The operator of the machine now drops asuliicient amount of lass into one of the molds which is disposedirectly beneath the knives, and at the same time he releases thecatchwhichl is holding the knives in open position. The closing of theknives severs the .glass in the mold from the mass from which it issupplied. The closing of the knives, by means of the rocker arms, raisesrod c which depresses the inner end of lever c", thus releasing thesprings on rod d?. The action of the springs is to swing the rocker armconnected therewith, and thus rotate sleeve D which by its bolt at itsupper end engages and rotates the table B a portion of a revolution.During this revolution of the table, one of the cam projections bengages and raises the inner end of lever c?, thus depressing rod c".The knives are thus opened again, and the lever of. is again reset. Atthe end of its partial revolution, one of the cam projections slidesback the catch e and the bolt E rises and engages and stops the table B.At the same time by means of the bar attached thereto it elevates rod Fwhich depresses the slide valve and admits steam through the upper port.The plunger is thus depressed into the mold, forming the article whichis being manufactured. When the required pressure to thoroughly pressthe plunger into the mold is exerted, any excess pressure in thecylinder will open the passage Way into the small cylinder and raise thepiston therein. This in turn raises the slide valve so that the upperport of the main cylinder is closed, steam is admitted on theundervside, and the plunger is raised. When the plunger was depressed,rod (i7 which is attached to the cross head was depressed, and by meansof the bell crank lever moved the rod d3 inwardly, where the collar dwas caught and held by lever c". lVhen the plunger was raised, the rodd3 was moved outwardly again, compressing the springs, thus setting thesprings for the next operation. The machlne has thus completed the cycleof its operation and the result is, for instance, a common tumblerwhich, however, the operations so far described have left in the mold.During the next ,cycle of operation similar to the one described, themold into which'the plunger has been depressed during the last cyclewill be advanced a partial revolution of the table. During this advance,the rod Z is engaged and raised by an inclined bracket m3 which iscarried by alever m. The rod and ejector push the tumbler up from themold into the end of slideway M. When the plunger is being depressedinto the followino' mold, the cross head carries downwardly with it therod m2 which by means of the lever and second rod raises the pivotedslideway M so that the tumbler E,slides off into any suitablereceptacle.

It is finally to be noted that my improved machine lends itself toaccurate adjustment in several ways. It is important that the speed withwhich the plunger descends or rises from the mold be accuratelycontrolled. The glass must be made to flow into its molded form within aproper time. If thev ilow should be too rapid, defective pressure marksin the resulting article will be caused,

j and if too slow, the glass will chill too rapidly and an imperfectarticle will be produced. The valves in the inlet ports to the cylinderrender the speed of descent and elevation of the plunger entirelysubject to the operators control. Furthermore, the plunger must not onlypress the glass into the mold at thev proper speed referred to, but itmust exert its pressure in the glass in the mold a correct length oftime, and no shorter time, nor longer time will produce a perfectarticle. If the pressure should be exerted through too long a period,the heat conductivity from the" glass being molded will tend to crackthe glass, While if too short, the insufficient heat loss will cause aconsequent distortion of the article. The period during which theplunger thus exerts its pressure upon the glass may be accuratelypredetermined by regulation of the valve c, so that when any givenpressure is exerted by the plunger, an excess of pressure inthe cylinderwill open the valve and raise the piston. Finally, the needle valve 7c*permits adjustment of the passage k2 so that the period of time may bepredetermined in which such excess pressure may escape through saidpassage and raise the piston in the secondary cylinder.

It is seen, then, that my machine is adapted to completely form anyrequired article from molten glass into a finished article. Itsoperations are entirely automatic with the exce tion of the manually'operable catch Cwhich holds the knives in open position. It is desiredthat this be manually operable in order that the operator may havecomplete control of the machine, and although this machine is adapted toperform this cycle of operations entirely automatically, it has been sodesigned and arranged as to avoid much of the complexity whlch is usualin automatic machines.

Other modes of applying the rinciple of my invention may be em loyeinstead of the, one explained, change eing made as regards the mechanismherein disclosed, royided the means stated by any of the folibwmgclaimsor the equivalent of such stated means be employed,

I therefore particularly point out and distinctlfl claim as myinvention 1. n a machine of the class described, the combination of asuitable support; a revoluble table; a plurality of molds carried by-the table; normally inoperative glass severing means arranged above thetable; normally inoperative means for revolving the table and adapted tobe rendered operative by operation of the severing means; means operableby revolution of the table and adapted to return the severing means toits normal position during such revolution; means operable by revolutionof the table for stopping such revolution; and vertically reciprocableplunger means above the table.

2. In a machine of the class described, the combination of a suitablesup ort; a revoluble table; a plurality of mo ds carried by the table;normally inoperative glass severing means arranged above the table;normally inoperative means for revolving the table\ and adapted to berendered operative by operation of the severing means; means operable byrevolution of the table and adapted to return the severing means to itsnormal position during such revolution; means operable by revolution ofthe table for stopping such revolution; a vertically reciprocableplunger adapted to be depressed by operation of the sto ping means; andmeans for elevating the p unger.

3. In a machine of the class described, the combination of a suitablesupport; a revoluble table; a plurality of molds carried by the table;normally lnoperative glass severing means arranged above the. table;normally inoperative means for revolving the table and adapted to berendered operative by operation of the severing means, revolution of thetable being adapted to return the severing means to its normal positionduring such revolution; means operable by revolution of the table forstopping such revolution; a vertically reciprocable plunger adapted tobe depressed by operation of the stopping means; and means for elevatingthe plunger.

4. In a machine of the class described, the combination of` a suitablesupport; a revoluble table; a plurality of mo ds carriedby the table;normally inoperative glass severingsuc revolution; means operable byrevo- ,lution of the table for stopping such revolution; a vverticallyreciprocable plunger adapted `to be depressed by operation of thestopping means; and means for elevating the plunger, reciprocation ofthe plunger being adapted to return the means for re- A,volving thetable to its normal position and elevation of the plunger being adaptedto render the sto ing means inoperative.

5. In a ma ine of the class described, the

,combination oa-suitable su port; a revoluble vv,tablel provided on itsperiphery with cam projections; a plurality of molds carried by thetable; normally inoperative means for .revolving lthe table; coperativeknives piv- `oted above the table about a vertical axis, a ,verticallyreciprocatory rod adjacent to the axis, .a transverse rotatable shaft,levers fixed thereon and connected with said knives, a leveriixed onsaid shaft and connected with saidrod, a spring tending to raise saidrod ,and thereby. clo'se said knives, a lever connected at one end withsaid rod and adapted .to have its .other end raised by the camprojections on the table, a lever attached at one end to said rod andits other end being adapted, when said rod isdepressed, to hol the meansfor revolving the table inoperative, and a catchoadapted to hold theknives in open position; means operable by revolu- -tion of the tablefor stopping such revolution; a vertically reciprocable die adapted tobe depressed by operation of the stopping fmeans; and means forelevating the plunger, reciprocation of the lunger being adapted to.return the means or revolving the table o to its 4normal position andelevation of the die being adapted to .render the stopping meansinoperative.

6. In amachine of th'e class described, the vcombination of a suitablesup ort; a revoluble table; a plurality of mo ds carried by 55. thetable; normally inoperative lass severvmg means arranged above the tale; a rotata lefshaft, an arm fixed to the shaft and adapted to engagethe table in one direction,

a horizontally reci rocable rod, an arm fixed to fsaid. shaft anslidably connected with Asaid rod, a spring on said rod ltending to movesaid arm, means connecting` said arm with the severing vmea-ns andadapted to allow movementof the arm only on operation of the severingmeans, and revolution of the table being adapted to return thesevnormally inoperative means for revolving'l the table and adapted tobe rendered operative byV operation of the severing means, revolution ofthe table being adapted to return the -severing means to its normalposition; a vertically reciprocable rod ada ted in its upper position'to retain the ta le against revolution, and a catch operable by said camprojections and normally retaining said rod 1n its lower position; asecond vertically reciprocable rod adapted to be elevated by the rst rodand to depress the iirst rod by. its

own depression, a ever ivoted at one end to said second rod, a iiuipressure cylinder, a piston reciprocable therein, a iston rod providedwith a 'plunger at its ower end, said cylinder being rovided with inletports above and below tiie piston, a slidevvalve controlling said ports,and a stem for the Valve pivoted to the other end of said lever; meansfor elevatin the valve, means operable by reciprocation of the plungerand adapted to return the nieans for revolving the table to its normalposition. M

8. In a machine of the class described, the combination of a suitablesupport; a revoluble table provided on itswperiphery Withcamprojections; a plurality of molds carried by the table; normallyinoperative glass severing means arranged above the table; normallyinoperative means for revolving the table and adapted to be renderedoperative by operation of the severing means, nevolution of the tablebeing adapted to return the severing means to its normal position; afirst vertically reciprocable rod adapted in its upper position toretain the table against revolution, and a catch operable by said camprojections and normally retaining said rod in its lower position; asecond vertically reciprocable rod adapted to be elevated by the firstrod and to depress the first rod by its own depression, a lever pivotedat one end to said second rod, a fluid pressure cylinder, a pistonreciprocable therein, a piston rod provided with a plunger at its lowerend, said cylinder being provided with inlet ports above and below thepiston, a slide valve controlling said ports, a stem for the valvepivoted to the other end of said lever, a second cylinder connected withthe rst cylinble table; a plurality of mol s carried by the table;normally inoperative lass severing means arranged above the ta le;normally inoperative means for revolving the table; meansfor operatingthe last named means and adapted to be rendered operative byoperation ofthe severing means, means operable by revolution of the table andadapted to return the severing means 'to its normal position; meansoperative by revolution of the table for stopping such revolution; avertically reciprocable plunger; means operative by the stopping meansfor depressing said plunger; means for elevating the plunger,reciprocation of the plunger being adapted to return the means forrevolving the table to its normal position, and elevation of the plungerbeing adapted to render the stopping means inoperative; rodsreciprocable through said molds and normally tending to assume theirlowermost positions, a pivoted guide having its free end adjacent to oneposition of said molds, a lever havin one end depressible by depressionof sai plunger, a rod connected with said guide and with the other endof said lever, and an inclined track provided' on said lever and adaptedto engage said rst rods.

10. In a machine of the class described, the combination of a suitablesupport; a revoluble table; a plurality of molds carried by the table; afluid pressure cylinder, a piston therein, said cylinder being providedwith inlet ports above and below the piston and with an outlet, a rodattached to the piston and provided with a plunger at its lower end, asl1de valve controlling said inlet ports', a lever, a stem for saidvalve and pivoted to,one end of said lever, a second cylinder, a pistontherein, a rod attached to the piston and pivoted to said lever adjacentto said valve stem, a passage'connecting the first cylinder above thepiston with the second cylinder below the piston, a valve in suchpassage openin toward the second cylinder, and means or elevating thefree end of said lever.

11. In a machine of the class described, the combination of a suitablesupport; a revoluble table; a plurality of molds carried by the table; afluid pressure cylinder, a piston therein, said cylinder being providedwith inlet ports above and below the piston and with an outlet, meansfor varying the opening through said ports, a rod attached to the pistonand provided with a plunger at its lower end, a slide valve controllingsaid inlet ports, a lever, a stem for said valve and pivoted to one endof said lever, a second cylinder, a piston therein, a rod attached tothe piston and pivoted to said lever adjacent to said valve stem, apassage connecting the first cylinder above the piston with the secondcylinder below the piston, a valve in such passage opening toward thesecond cylinder, means for regulating the opening in said passage, andmeans for elevating the free end of said lever.

12. In a machine of the class described, the combination of a suitablesupport; a revoluble table; a plurality of molds carried by the table;normally inoperative glass severing means arranged above the table;normall inoperative means for revolving the ta le and adapted to berendered operative by operation of the severing means; means o erable byrevolution of the table for stopplng such revolution; a verticallyreciprocable plunger adapted to be depressed by operatlon of thestopping means; means for elevating the plunger; rods reciprocablethrough said molds and normally tending to assume their lowermostpositions, a pivoted guide having its free end adjacent to one positionof said molds, a lever having one end depressible by depression of saidplun er, a rod connected with said guide and with the other end of saidlever, and a cam provided on said lever and adapted to engage said irstrods.

Slgned by me this 29 day of October,

. WALLACE S. GRAHAM. Attested b W. H. Curran,

ROBERT L. FRINK.

